Andrew patterson



' A.- PA-TTERSUN.

DIE FOR MAKING BELLS No. 62,678. Patented Mare 5, 1867.

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'PA'.I"IERSON, OF BIRMINGHAM, PENNSYLVANIA.

Letter.9 Patent No. 62,678, dated March 5,1867.

- mrnovsusnr IN DIES FOR MAKING BELLS.

-Be it lrnown that I, ANDREW Pursusommf Birmingham, Allegneny county,State of Pennsylvania, have invented ,certain -new and usefulImprovements in Manufacture of Bells; and'I hereby declare that thefollowing is a full, true, and exact description of the same, referencebeing had to the accompanying, drawings, which form part of thisspecification, and to the letters of explanation marked thereon.

Y -My invention consists in forming bells of the ordinary shape fromcircular plates of steel by subjecting them-to pressure, while renderedpliable by heat, between suitably formed :dies. The general principleswhich enter into the mechanical operation are old and well understood byworkers in sheet metal, and need no especial explanationl I Y i Inmaking bells by my invention, take a circular plate of steel aboutone-fourthlargerin diameter than the intended bell, and having heated itto about a cherry red, I apply the pressure of a drop-press to it placedbetween a pair of dies similar .to those represented by the sectionaldrawing, fig. 2, a b; I then reheat and strike it between another pairof dies, which more'nearlyapproximate the intended shape, and repeatthis process of heatingand'press ng each time with another pair ofdiesuntil the proper shape of bell is obtained.

' Figure 1, in thc'drawings, represents a sheet of steel before it hasreceived the impressof any of the dies. Figures 2, 3, 4, 5, 6, 7 aresectional views of a series 'of dies, such as I use in formingordinary-shaped bolls, a indicating the femaleand 6 the male die in'allthe drawings.

Figure 8 is a section of a bell-formed from a: sheet of metalby passingthrough this series of dies in the manner described. 4 I I v I I It willbe seen that each pair of diesinto which the heated platc is put forstamping, has a different form and shape from the pair of dies in whichit was last impressed, thus passing through the various series of diesuntil it has passed. through the last pair, which give it the shapedcsiredofa perfect bell. It will be 'further seen that the diesallow athickening of the lower rimor edge of the bell at its mouth, which,strengthens the bell at this point, where the greatest danger andliability tocrack exists, and whioh increases the "tone of the bellgreatly.

, The advantages of my improvementare economy of production, withgreater variety and depth of tone, and greater strength and durability,than can belobtainediwith thesame weight of metalwhen the bells areformed by casting. Bells made by i'ny process are especially. adapted tobe arranged in musical-chimes, as the tone' or note desired can bercadilyapproximatod by changing the temper or hardness of the steel.After being formed, these-bellsmay he finished lay-plating with finermetals, as is done with cast-bells when ornament is' desired. i

I am aware that it is not new .to form vessels by gliesfrotn sheetmetal. I do not,'th erefore, claim as now,

P stampingivcssels from sheet metal by means of dies, but what I doclaim as new, and desircto secure by Letters Patent,is---. I

The manner herein described of forming bells out of circular sheets ofsteel, by means of the action of a series of dies of diifcrent shapes,constructed and operating on the material substantially as described, soas to condense or thicken the outer portion of said sheets, thus formingthe bells with a gradually increased thickness from their apex or-ccntreto thc b ascvor uiouth, as described and set forth,

A. PATTERSON.

Witnesses:

A. B. Srnvsuson, JAMES Mouton

